finger her at the same time. Ask her how she'd like it. Personally, I haven't received any good oral without fingering at the same time.

First of all, don't try to stick your tongue down her vagina; it's far too small to do anything for her that way. So focus on her clitoris. Try varying the speed and direction of your licking until you find a rhythm that she likes. Go up-down and also left-right. Move your tongue in circles around her clitoris too. Try different positions, too; if you've only ever done it with her on her back, try in a 69 position or with her sitting on your face.

Also, listen to >>2287.